diff --git a/README.md b/README.md
index 80541933..02f0faab 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@
 
 **1. Mal is a Clojure inspired Lisp interpreter**
 
-**2. Mal is implemented in 78 languages (79 different implementations and 100 runtime modes)**
+**2. Mal is implemented in 78 languages (80 different implementations and 101 runtime modes)**
 
 | Language | Creator |
 | -------- | ------- |
@@ -860,6 +860,16 @@ cd python
 python stepX_YYY.py
 ```
 
+### Python.2 (3.X)
+
+The second Python implementation makes heavy use of type annotations and uses the Arpeggio parser library.
+
+```
+# Recommended: do these steps in a Python virtual environment.
+pip3 install Arpeggio==1.9.0
+python3 stepX_YYY.py
+```
+
 ### RPython
 
 You must have [rpython](https://rpython.readthedocs.org/) on your path